Waterbed pump or similar article



FIG. 1 is a left side elevational view of a waterbed pump or similar article showing my new design;

FIG. 2 is a front elevational view;

FIG. 3 is a right side elevational view;

FIG. 4 is a rear elevational view;

FIG. 5 is a bottom plan view; and,

FIG. 6 is a top plan view. 

The ornamental design for a waterbed pump or similar article, as shown. 